Rubbing and grinding machine



Sept. 29, 1931. H. G. BARRETT 1,825,299

RUBBING AND GRINDING MACHINE Filed Aug. 1'7l 1928 3 Sheets-Sheet 1 Sept. 29, 1931. H. G. BARRETT RUBBING AND GRINDING MACHINE Filed Aug. 17, 1928 3 SheetsSheet 2 Sept. 29, 1931. H. G. BARRETT RUBBING AND GRINDING MACHINE Filed Aug. 17, 1928 SvSheets-Sheet 3 Inni/Aux u l 1 P@ Patented Sept. 29, 1931 UNITED STATE QFFlCE,

HAROLD G. aannam, or WILMnTrn, rumors, A ssrenoit me rymironn rnonoc'rs i Conroe-Arron, or CirrcAediLLINoIsgA coar'onn'rron orV I LnrnorsV RUBBING AND GRINDING MACHINE Application filed August 17, 1928. Serial No. 300,175.

This invention is particularly adapted, though not necessarily limited in its use, for rubbing and grinding casings of golf club shafts.

[,- Heretofore in the manufacture of golf club shafts, especially the type in which a fierible tubular casing of compara-tively hard and non-1netallic substance is sleeved thereupon, it has been found that the cores over which @i the tubing is sleeved are not always uniform, in that oftentimes the core is not perfectly round, or by reason of some other defect, With the result that heretofore the grinding and rubbing operation has resulted in remov- 4;; ing unequal amounts of the material ofthe sleeve or casing at different pointsthereof, which is not desirable for many reasons, among others, the shaft When finished will not be properly balanced.

, It is one of the objects of the present invention to overcome these difficulties and objections and to provide van improved rubbing and grinding machine of this lcharacter by means of the use of which theV casing or sleeve La will be uniformly ground or rubbed the be a submerged grlndingforrubbing operation and vat the same time the partswill be submitted to abodily agitationto insurethat the rubbing or grinding surface will be Well supplied with the abrasive or grinding material or compound.

To the attainment of these ends and the accomplishment of yother new and useful objects as -,Will appear, the invention consists in the features of novelty in substantially the w15 construction, combination and arrangement of the several parts lhereinafter more fully described and claimed and shown inthe accompanying drawings illustrating this invention, and in which Figure 1 vis a sideelevation ,of amachine of this character constructed in accordance with the principles ofthis invent-ion.

Figure 2 is a verticalsectionalview taken .er1 1.111@ 2F25 lFeurel- Figure?, is a vertical sectional view taken on line 3 3, Figure 1. Y

Figure 4 is a detail sectional View taken on line {1 -4, Figure l'. 'i

Figure 5 is an enlarved detail sectional viewtaken on line 5 5, ig'ure, of the work to be operated' upon. A i `Figure 6 is a detail sectional view taken on line 6- 6, Figui-e3, with parts omitted.

The machine consists essentially of ancontainer having a bottom section 10 provided with Va laterally projectirigfflange 11 around the upper edge thereof, a `tubular portion 1Q communicating tyith'the bottoni section, and a top or cover section 13 having a laterali projecting iange 14 which co-operat'esvtvit i the-flange 11 on the section'lO', andsuitable packing material 15 is providedbetyveen the flanges 11' and 11i to forma fluid tight joint.

he sections v10 and 13 'are connected together by means of a hinge 16. 'v i ASecured to the `bottom section 10 is an angle iron 1.7 which encompasses thebase, and secured to the Aangle ironsl anddepending therebelow are angle irons 18'Which extend transversely ofthe bottom section 1Q.

VSecured tothe angle'iirons 18 are'me'm` bers 19 that project beyond theends of the members 18 VVand are preferably'reduced 'as at 20. Four of these members 19 are preferably provided, one at each corner of the base, and the kreduced portions f2() Vof the members 19 project into shoes or bearing members 21, the latter beingV looselyY Vconnectedivith the Aportions 20.

.These shoes 2 1 j are adapted to reciprocate in guideivays 22 lmounted upon a suitable supporting structure 23 `sol that the con tainer is adapted to be given a reciprocatory movement lengthwise of the guideways 22. Any suitable means vmay be provided for accomplishing this reciprocator movement and toV that end there mayl ehprovided spaced parallel members .24 `Which Aarefsecured between the Vangle vmembers 18 crolssmembers 25 which are secured between the members 1S. lllhe members 25 are provided with openings to receive a bar or rod Q5 which is formed with a shouldered portion 2? having trunnions 28 projecting laterally therefrom. Coil springs 29 encein- .r the bar or ro"l 28 on opposite sides of the head 2T, one end of each of the springs resting against the heal 27 and the other end against the respective bar or member 25. A yolie 30 is provided which has a bifurcation 3l into which the trunnions 28 project7 and this yell-:e is pivotally mounted as at 3L)- to a fixed support.

The voire is provided with an elongated slot 33 for receiving a pin or 1)rejection 34 carried by a gear wheel 35. Meshing with the gear 35 is a gear 35 that is connected with a gear 3T for rotation therewith and the gear 37 in turn meshes with a gear 88 on the shaft of the motor 39.

rl`hus it will be seen that when the gear 35 is rotated the yolle 30 will be oscillated about its pivot and thereby cause a reciprocatory movement of the container' carrying the shoes 2l, which latter reciprocate in the guides 'lhe springs 29 form cushioning` means oper c at the ends of the movement of the container in the respective directions.

When the container is filled with a liquid and abrading material, it will be manifest that upon the bodily reciproeation of the container mon'icntuin will be imparted to the abrading or grinding material and the cushions or springs 29 are pr-ovided for cushioning the cont; `ner against shock or vibration under the in; vence of the abrading material the container is reciprocated.

Mounted in the lower section l0 of the container and extending thereacross transversely tnereof, are spa ed parallel rock shafts iO-4l and mounted in the upper section of the container are similar spaced parallel rock shafts 42-43. Secured to the roel: shafts -42 are toothed segments which mesh with each other, and similar toothed segments 4(3-47 are respectively secured to the rock shafts 4l and 43 and mesh with each other.

Any unnber of t1v ese pairs of-intermesh ing gears 44 -45; may be provided, but one pair is )r ferably arranged at each end ef the rc cetir .e shafts Carried by afts 4l nd are arms a fin-42) and carri' shafts 40-4-2 are arms Any number of these arms may be provided, but in the present form of the invention four pairs are shown, two arms being connected with each of the shafts 40 4l, Connected with the arms on each of the shafts is i cross bar or member 52 and supported by each of these bars 52 are yokes or supporting members Any number of these yokes may be provided according to the number of shafts which it is desired to operate upon at the same time.

As shown in the drawings, the machine is adapted to simultaneously operate upon five shafts, and as the grinding and rubbing mechanism for each shaft is the same, the specific description of one will apply equally as well to them all. Supported by each of the yoles or supporting members 53 is a semi-circular member 54, two of these members being opposed to each other, each being provided with a rubbing surface 55. This surface 55 may be constructed of any suitable material such as felt, fabric or any other material suitable for the purpose and are removably secured to the respective members 54 in any suitable manner, preferably by providing a dove-tailed slot or groove 56 in the respective members 54, the slot being so shaped that when the material 55 is placed therein it will be locked against accidental displacement and at the same time the surface of the material 55 which contacts with the work 57 will be made to conform to the contour of the work.

rlhe members 55 are supported by the respective yolies or supporting members 53, prefe 'ably by means of a pin 58 carried by the yolies 53 which enter elongated slots 59 in the members 54 so that the members 54 will have a pivotal as well as bodily movement with respect to the yoles or supporting members 53. A resilient element (5() preferably in the form of a leaf sprine` is disposed between the bottom of the yoke or supliiorting member 53 and the proximate face of the member 54 and these springs 60 tend normally to move the members 54 towards each other so that the grinding or rubbing surfaces 55 will grip the work 57.

By the provision of the slots 59 it will be manifest that when the work 57 is inserted between the co-operating grinding or rubbing surfaces 55 of the co-operating mem bers 54, the members 54 will be adapted to assume relative posit-ions with respect to each other to compensate the varying sizes or diameters of the work.

It will therefore be manifest that in the event that a tapered piece of work 57 is inserted between the members 54 of different pairs of membersj the springs 60 will permit the members 54 to compensate the varying diameters of the work and will cause the work to be gripped by the rubbing surfaces with different tensions throughout the length of the work. rlhe slot and pin connection 58-55 between the members 54 and the members 53 will permit the members 54 to rock with respect to their supports.

In order to vary the tension of one set of members 54 upon the work with respect to the other set, it is only necessary to rock the respective eo-operating shafts 40-4Qg 4l-43. To that end there is provided an operating lever Gl which is connected with vneaaaee the shaft 4() and an operating lever 62 which is connected with the shaft- 41. These levers are arranged in a suitable position on the outside of the machine andthe levers are provided respectively with locking dogs 63 which co-operate respectively with toothed segments 64. The dogs are controlled by means of an operating handle 65 pivotally mounted as at 66 to the lever 62 and connected by means of a link 67 with the respective dog 68, a spring G8 being provided which tends nermally to move the dog 63 into engagement with the respective ratchet 64. Thus, by at just-ing either of the levers 61-62 the respective shafts LO--lll may be rocked and these shafts will through the medium of the respective intermeshing toothed segments 449-45; l16e-47, cause the respective pairs of members .54 to be separated or moved closer together to vary the grip of the working surfaces 55 upon the work 57.

Thus it will 'be seenl that a different stress or tension may be exerted upon different parts of the work 57.

The work 57 to be operated upon is fed through a suitable chuck 69 mounted upon a suitable support 70 and passes through the chuck and through an opening 7l in the wall of the lower section l() of the casing and is then passed between the respective `3o-operating members 54, the forward end of the work projecting into the tubular extension l() of the container.

In vorder to prevent the escape of the abrading material from the container a casing 72 is provided which surrounds the opening 7l and this casing is filled with suitable packing material 73 which encompasses the work.

Motion is imparted to the work by means of pulleys 7 4 connected with a portion of the chuck 69 and these pulleys are operated lin any suitable manner such as by .means of a fiexible driving element 75 engaging over the pulleys, motion being imparted to the driving element 75 from any suitable source, not shown.

A suitable drain outlet 76 may be provided for removing the contents of the container.

It :is thought that the operation of this device will be 4fully understood from the foregoing description, but briefly stated it is as Ifollows. The work to be ope 1ated upon is passed through the chuck 69' and also between the co-operating pairs of meinbers 54 with the work engaging surfaces 55 contacting with the work, the container being first filled with suitable abrasive or grinding material, preferably in a semiliquid form.

The levers 61 and 62 aretlien adjusted to produce Vthe required or desired tension between "the `co-operating grinding or rubbing elements. The motor 39 is then started, which 'willlrock the lyoke 30 through lthe me- 05 diam-of the igear 35 and pin'and slot connection 33-84. This will impart a bodily reciprocatoiy movement to the container while vthe work 57 is being held against longitudinal movement. During this bodily reciprocatory movement of the container the work will be rotated so that both a rotary and reciprocatory grinding or rubbing operation will be performed upon the work by reason of the relative and reciprocatory movements of the work and the grinding and rubbing surfaces.

Inasmuch as the container contains a large volume of abrasive material in liquid or semiliquid form, it will be manifest that when the container is bodily moved in one direction and this mot-ion suddenly arrested and the direction of movement of the container reversed, there will be considerable momentum imparted to the abrasive material within the container which might, under ordinary conditions, cause considerable damage and cause a considerable water hammer in the machine. By the provision of the cushioning springs 2S) this objection will be obviated.

It will also be manifest that with this improved machine all of the grinding and rubbinfr operations will be performed while the work is submerged and by the bodily reciprocatory movement of the container the rubbing surfaces 55 as well las the surface of the work 57 being acted upon, will be well supplied witli the abrading material.

It will also be manifest that with the present invention one-half of the grinding and rubbing mechanism is cariied by the lower section or portion of the container while the other half is carried by the upper portion or section, with'the result that when the container is opened by swinging the upper secw tion 13 about the hinge or pivot 16, the rubbing members 54 and rubbing surfaces 55 will be separated so that access may be readily had to the work. This also provides a means whereby access may be readily had to the rubbing surfaces 55 so as to remove them and replace them with other rubbing surfaces when desired.

With this improved mechanism it will also be manifest thatV the rubbing surfaces 55 will conform to the contour of the core upon which the sleeve or casing is placed, regardless of whether the core is regular or irregulai-,in cross section, with the result that an equal amount of rmaterial will be removed by the grinding and rubbing operation from the surface of the sleeve or casing, to cause the latter to be of uniform thickness at any cross sectional point throughout the length of the shaft and casing.

While the preferred form of the invention has been herein shown anddescribed, it is to be understood that various changes may be made in the details-of construction and in the combination and arrangement of the several NES CVI ...u

parts, within the scope of the claims, without departing from the spirit of this invention.

Vhat is claimed as new is l. A machine of the character described embodying opposed (2o-operating rubbing elements between which the work is disposed, means for imparting a rotary and also a bodily reciprocatory movement to the work and said elements one with relation to the other, resilient means individual to the elements for maintaining the said elements and the work in engagement, and means common to said resilient means for varying at will the stress thereof.

2. n machine of the character described embodying a work holder, a rubbing element, means for supporting the element for bodily movement towards and away from the work and tor pivotal movement with relation to the work, and means for imparting a bodily reciprocating movement and a rotary movement to the work and said element one with relation to the other.

A machine of the character described embodying a work holder, a rubbing element, means for supporting the element for bodily movement towards and away from the work and for pivotal movement with relation to the work, means for imparting a bodily reciprocatory movement and a rotary movement to the work and said element one with relation to the other, and a container in which said element is disposed whereby the work and rubbing element may be maintained submerged in a grinding composition.

4. A machine of the character described embodying a work holder, a rubbing element, a pivotally mounted support, means pivotally connecting the element with the support tor bodily movement towards and away from the work and for pivotal movement with relation to the work, means for imparting a bodily reciprocatory movement and a rotary movement to the work and said element one with relation to the other, a container in which said element is disposed whereby the work and rubbing element may be maintained submerged in a grinding composition, and means for agitating the container.

A machine of the character described embodying a container, means for holding the work submerged in a grinding composition within the container, a rubbing element within the container, means for imparting relative movements of the work and said element one with relation to the other to effect a grinding operation` and means for agitating the container. the last said means embodying a member slidably connected with the container, an operating element connected with said member, and springs interposed between said container and the first said member on opposite sides ot the latter.

A machine of the character described embodying a container, means for holdingr the work submerged in a grinding composition within the container, a rubbing element within the container, means for imparting relative movements of the work and said element one with relation to the other to effect i. i

a grinding operation, means for imparting a reciprocatory movement to the container, and means for cushioning the movements of the container.

7. A machine of the character described embodying' a container, means for holding the work submerged in a grinding composition within the container, a rubbing element within the container, means for imparting relative movements of the work and said element one with relation to the other to effect a grinding operation, means for imparting a reciprocating movement to the container, and means for cushioning the relative movements ot' the container and the grinding composition therein, one with relation to the other.

8. A machine oi the character described embodying a container having a body and a closure section hingedly connected together, co-operating rubbing elements one carried with each of the container sections, means for holding the flo-operating elements against the work when the container is closed, and means for imparting reciprocating and rotary movements of the said element and the work one with relation to the other and when the work and elements are in contact.

9. A machine of the character described embodying a container having a body and a closure section hingedly connected together, co-operating rubbing elements one carried with each of the container sections, resilient means for holding the co-operating elements against the work when the container is closed, means for varying at will the stress of said elements against the work, and means for imparting reciprocating and rotary movements ot the said element and the work one with relation to the other and when the work and elements are in contact.

l0. A machine of the character described embodyinga work holder, a pair of opposed co-operating rubbing elements mounted for bodily movements towards and away from the work and for pivotal movement with respect to the work on an axis intersecting the axis of the work, and means for imparting a bodily reciprocating movement and a rotary movement of the said elements and the work one with relation to the other and while the work and elements remain in contact with each other.

l1. A machine of the character described embodying a work holder, a pair of opposed co-operating rubbing elements mounted for bodily movements towards and away from the work and for pivotal movement with respect to the work on an axis intersecting the axis of the work, means for yieldingly holding the said elements and work in engagement, means for varying at will the stress of such engagement, and means for imparting a bodily reciprocating movement and a rotary movement of the said elements and the work one with relation to the other and while the work and elements remain in contact with each other.

12. A machine of the character described embodying means for holding the work, a rubbing element, a support for the element, means connecting the element to the support for bodily movement toward and away from the work, and for pivotal movement with respect to the work on an axis intersecting the axis of the work, means for actuating the support to move the element toward and away from the work, and means `disposed between the support and said element for yieldingly maintaining the said element in engagement with the work.

In testimony whereof I have signed my name to this specification, on this 14th day of August, A. D. 1928.

HAROLD G. BARRETT. 

